An image forming apparatus configured to perform high-quality image formation regardless of an accuracy of mounting surface emitting element array chips includes an image data generating portion configured to generate pixel data equivalent to 2,400 dpi; a joint correcting portion configured to correct a misregistration amount at a joint between a predetermined surface emitting element array chip and a surface emitting element array chip arranged adjacent to the predetermined surface emitting element array chip; and a resolution converting portion configured to convert a resolution of the pixel data from 2,400 dpi to 1,200 dpi. The joint correcting portion is configured to correct the misregistration amount at the joint with respect to pixel data obtained after the resolution thereof is converted by the resolution converting portion.

A receipt printing apparatus comprises a printer including a processor and a printing unit that is capable of printing on a printing medium. A registration device is connected to the printer. The printer stores a control program that when implemented by the processor causes the printer to acquire transaction details from the registration device, to receive a selection of a first output receipt type and a second output receipt type, and to output the transaction details in the selected one of the first output receipt type and the second output receipt type.

An information processing apparatus includes a resolution converting unit that converts the resolution of input image data into a low resolution by using a “reference shift” method; a dot processing unit that deletes a dot area that occurs on an edge portion of an object in image data that is obtained by the resolution converting unit; and a format converting unit that converts image data, from which the dot is deleted by the dot processing unit, into the format of an output processing unit that prints the input image data with a low resolution.

A printing apparatus includes a transport roller applying a transport force to a label sheet having a backing sheet to which a label is attached, a printing head performing printing on the label sheet, a detaching roller configured to apply to the backing sheet a tension for detaching the label from the backing sheet at a detaching unit that detaches the label from the backing sheet and apply a transport force to the backing sheet from which the label was detached, and a control unit controlling the transport roller and the detaching roller, wherein the control unit controls driving of the transport roller and the detaching roller such that a front tension, which is a tension applied to the label sheet at the position of the transport roller, when the label sheet is back-fed to upstream in the transport path, is smaller than a front tension when the label sheet is front-fed to downstream.

Provided is an image forming apparatus configured to perform high-quality image formation regardless of an accuracy of mounting surface emitting element array chips. The image forming apparatus includes: an image data generating portion (401) configured to generate pixel data equivalent to 2,400 dpi; a joint correcting portion (1702) configured to correct a misregistration amount at a joint between a predetermined surface emitting element array chip and a surface emitting element array chip arranged adjacent to the predetermined surface emitting element array chip; and a resolution converting portion (1702) configured to convert a resolution of the pixel data from 2,400 dpi to 1,200 dpi. The joint correcting portion (1702) is configured to correct the misregistration amount at the joint with respect to pixel data obtained after the resolution thereof is converted by the resolution converting portion 1702.

A controller circuit board outputs image data. A head circuit board controls a head unit in accordance with a setting data list. An engine circuit board controls a sheet transportation unit, and sets setting data in the setting data list in accordance with a command from the controller circuit board. The head circuit board receives the image data from the controller circuit board not through the engine circuit board. The controller circuit board outputs a backup command and thereby causes the engine circuit board to acquire the setting data list from the head circuit board, acquires it from the engine circuit board, and store it in a storage device, and outputs a restoration command and a setting data list read from the storage device and thereby causes the engine circuit board to renew the setting data list in the head circuit board.

A printing apparatus includes a transport roller applying a transport force to a label sheet having a backing sheet to which a label is attached, a printing head performing printing on the label sheet, a detaching roller configured to apply to the backing sheet a tension for detaching the label from the backing sheet at a detaching unit that detaches the label from the backing sheet and apply a transport force to the backing sheet from which the label was detached, and a control unit controlling the transport roller and the detaching roller, wherein the control unit controls driving of the transport roller and the detaching roller such that a front tension, which is a tension applied to the label sheet at the position of the transport roller, when the label sheet is back-fed to upstream in the transport path, is smaller than a front tension when the label sheet is front-fed to downstream.

A pixel clock generating device includes a high-frequency clock generator, a comparer, a pixel clock generator, and a value switcher. The high-frequency clock generator is configured to generate a high-frequency clock. The comparer is configured to measure a time interval between a leading-end synchronizing signal and a trailing-end synchronizing signal in a main scanning and calculate an error between the time interval and a target value. The pixel clock generator is configured to generate a pixel clock based on the high-frequency clock and a pixel clock frequency and correct the pixel clock based on the error. The value switcher, including a plurality of groups of values with which the pixel clock is generated, is configured to switch between the plurality of groups of values according to a switching signal after the trailing-end synchronizing signal is inputted, the comparer calculates the error, and the pixel clock generator corrects the pixel clock.

A controller circuit board outputs image data. A head circuit board controls a head unit in accordance with a setting data list. An engine circuit board controls a sheet transportation unit, and sets setting data in the setting data list in accordance with a command from the controller circuit board. The head circuit board receives the image data from the controller circuit board not through the engine circuit board. The controller circuit board outputs a backup command and thereby causes the engine circuit board to acquire the setting data list from the head circuit board, acquires it from the engine circuit board, and store it in a storage device, and outputs a restoration command and a setting data list read from the storage device and thereby causes the engine circuit board to renew the setting data list in the head circuit board.

A method of printing an image using a printing system having first and second overlapping printhead segments. The method includes the steps of: (i) identifying a strip of the image to be printed in an overlap region of the first and second printhead segments; (ii) determining a stitching technique for the first and second printhead segments; and (iii) printing the image using the first and second printhead segments, the printing including stitching the first and second printhead segments in the overlap region using the determined stitching technique. The stitching technique may be a butt stitch or a feathered stitch, dependent on image content in the strip.